Demonstration of electrically tunable artificial electrostatic crystals in GaAs 2DEG forming graphene-like and kagome-like bands with an insulating state at kagome half-filling interpreted as loop-current Wigner insulator.
As the potential amplitude is reduced bands begin to overlap starting with the higher-energy bands first (see Figs
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Artificial electrostatic crystals: a new platform for creating correlated quantum states
Demonstration of electrically tunable artificial electrostatic crystals in GaAs 2DEG forming graphene-like and kagome-like bands with an insulating state at kagome half-filling interpreted as loop-current Wigner insulator.